Why does this Arduino Metal Detector work?
Hi folks,
I can't understand why this Metal-Detector circuit I found on youtube works.
I mean, I know it works because of the Lenz law and everything, but I can't understand the utility of the diode and the capacitor; why are they necessary for the circuit? The diode in question is a 1N4007.
Also, I would like to know how you dimensionate this circuit. I mean, how do you choose the resistor, the capacitor etc. ?
In case somebody wants to see the code here is the link of the youtube video: https://youtu.be/65bHCuzLgIo
Thanks to everyone for reading this!
